CVE-2026-11976
The official MonsterInsights Pro update distribution bucket (`monster-insights.s3.amazonaws.com`) was compromised. Both the current release
CVSS
10.0
Critical
EPSS
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KEV
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Exploit Today
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0-100
Published: Aug 6, 2026 · Last modified: Aug 6, 2026
Not enough EPSS history yet.
The official MonsterInsights Pro update distribution bucket (`monster-insights.s3.amazonaws.com`) was compromised. Both the current release (10.2.2) and the version MonsterInsights rolled back to (10.2.0) contain a malicious file, `class-system-check.php`. Three distinct variants were observed on 2026-06-11, all sharing the same AES-256-GCM key, confirming a single threat actor. The attacker retains write access to the S3 bucket and has been actively iterating on the payload throughout the day.
No related CVEs by CWE or product.